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The Radiospurs Header Website

The well known site for RF and Microwave analysis, design, calculators.

If you work on the Technical Side of the Radio Broadcast Industry, this is your gateway to design the hardware of your profession. There are articles on FM transmitters, Propagation analysis using Longley Rice calculations. Passive filters, microwave filters. Power combiners, Wilkinson, Hybrid. Couplers, microstrip, stripline, edge, broadside, slabline, coax. Interdigital filters, capacitive gap, edge coupled. Its all here.

See WEB SITE DETAILS above for a more complete description of each web site.

Where do you want to go?

General Broadcasting. Stereo Encoder, RDS Encoder etc...

Passive filters. Butterworth, Chebychev 1, 2, Bessel, Legendre, Bessel, Elliptic

Combiners (Wilkinson 2, 3, 4 way, multistep, with filter), Hybrid

RF Components, RF Capacitors, Inductors, Microwave Gap, DC Block

Microstrip(normal, suspended, inverted, with substrate, edge couplers)

Stripline (normal, mixed, slabline, power line, edge coupler, broadside)

Stepped line transformer

Microwave filter, Interdigital, Parallel Coupled, Gap Resonator

Cascade microstrip couplers (Symmetrical, Asymmetrical, Custom

Power Pads (Phi, Delta)

Propagation (Path loss, Friis, Egli, Great Circle, Longley Rice)

Waveguides, Meteorology, SNMP engines

Interactive Propagation Analysis, Radio Link, Broadcast

Antenna Analysis, Yagi, Log Yagi, Horn, Helix, Reflector

Image donated by Seratel

NEWS:

New April 2026

This new all Core site. Faster Leaner. Going good so far.

A number of calculations have been made clearer. There is now a high pass Chebychev11 (Inverted Chebychev) Filter. The radio software demos now work. The elliptic filter design now converges better.

Our companion site LongleyRice is now more complete. Better explaining of the ITM and some new documentation.

For microwave101 users. note: Free housing has been offered but no reply...